There isn’t really one precise formal style name for this look based on the answers provided. The most accurate description is that these are stock-photo-style portraits: clean, bright, commercial-looking images often used on websites and in advertising.

For the framing, a half-body image is commonly called a medium shot. Full-body is simply a full-length portrait. The bold colors may also remind some people of a pop-art-inspired look, especially when backgrounds and styling are very graphic.

As for lenses, there isn’t a single specific lens implied by this style alone. The look depends as much on lighting, background, styling, and post-processing as on the lens. For portraits like this, photographers commonly use normal to short-telephoto focal lengths, choosing based on how much of the subject they want in frame and how much background they want to show.